1BS Telegram

Owned by Matthias Kassner
11-Jul-2024
1 min read

RORG

1 Byte Sensor (1BS) telegrams use R-ORG 0xD5

Payload

The payload of 1BS telegrams consists of - surprise - one byte of payload (Bit0 … Bit7).

1BS telegrams are used exclusively to encode the status (open / closed) of a binary contact (typically a magnet contact). The payload can also identify a teach-in telegram (1BS Teach-in Telegram), which however does not provide information about the manufacturer.

 

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1BS Telegram Payload

The distinction between data and teach-in telegrams is made based on the status of Bit 3 (LEARN):

  • If Bit 4 is set to 0, then the telegram is a 1BS Teach-in Telegram

  • If Bit 4 is set to 1, then the telegram is a 1BS Data Telegram

If the telegram is a 1BS Data Telegram, then Bit 0 (CONTACT) identifies the contact status:

  • If Bit 0 is set to 0, then the contact is open

  • If Bit 0 is set to 1, then the contact is closed